1
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Gok B, Budama-Kilinc Y, Kecel-Gunduz S. Anti-aging activity of Syn-Ake peptide by in silico approaches and in vitro tests. J Biomol Struct Dyn 2024; 42:5015-5029. [PMID: 37349941 DOI: 10.1080/07391102.2023.2223681] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 06/06/2023] [Indexed: 06/24/2023]
Abstract
The increase in the aging population worldwide has led scientists to turn to research to prevent the aging process. In this context, synthetic peptides emerge as candidate molecules for developing new anti-aging products. This study aims to investigate the possible interactions of Syn-Ake, a synthetic peptide, with matrix metalloproteinases (MMPs) and Sirtuin 1 (SIRT1), which are the targets of anti-aging activities with in silico approaches, and to determine the antioxidant activity, and safety profile of the peptide by in vitro methods such as cytotoxicity (MTT) and genotoxicity (Ames) tests. The molecular docking study showed that the docking score energy of MMP receptors was in the order of MMP-13 < MMP-8 < MMP-1. Syn-Ake peptide provided the lowest and the most stable binding to the SIRT1 receptor at -9.32 kcal/mol. Binding interaction and protein-ligand stability of Syn-Ake with MMPs and SIRT1 in a dynamic system were predicted by 50 ns molecular dynamic (MD) simulation studies. The MD results showed that the Syn-Ake peptide remained stable in the active site of MMP-13 and SIRT1 receptors during 50 ns simulations. In addition, the antioxidant activity of Syn-Ake was investigated using diphenyl-2-picril-hydrazine (DPPH) method since it is crucial to remove free radicals that are effective in skin aging. The results revealed the concentration-dependent increased DPPH radical scavenging activity of the peptide. Finally, the safety of the Syn-Ake was investigated, and the safe dose of the peptide was determined. In conclusion, in silico and in vitro analyses show that the Syn-Ake peptide may hold promise in anti-aging formulations with its high efficacy and safety profile.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Bahar Gok
- Graduate School of Natural and Applied Science, Yildiz Technical University, Istanbul, Turkey
| | - Yasemin Budama-Kilinc
- Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Yildiz Technical University, Istanbul, Turkey
- Health Biotechnology Joint Research and Application Center of Excellence, Istanbul, Turkey
| | - Serda Kecel-Gunduz
- Faculty of Science, Department of Physics, Istanbul University, Istanbul, Turkey
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2
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Bhat RAH, Khangembam VC, Pant V, Tandel RS, Pandey PK, Thakuria D. Antibacterial activity of a short de novo designed peptide against fish bacterial pathogens. Amino Acids 2024; 56:28. [PMID: 38578302 PMCID: PMC10997546 DOI: 10.1007/s00726-024-03388-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 03/06/2024] [Indexed: 04/06/2024]
Abstract
In the face of increasing antimicrobial resistance in aquaculture, researchers are exploring novel substitutes to customary antibiotics. One potential solution is the use of antimicrobial peptides (AMPs). We aimed to design and evaluate a novel, short, and compositionally simple AMP with potent activity against various bacterial pathogens in aquaculture. The resulting peptide, KK12YW, has an amphipathic nature and net charge of + 7. Molecular docking experiments disclosed that KK12YW has a strong affinity for aerolysin, a virulence protein produced by the bacterial pathogen Aeromonas sobria. KK12YW was synthesized using Fmoc chemistry and tested against a range of bacterial pathogens, including A. sobria, A. salmonicida, A. hydrophila, Edwardsiella tarda, Vibrio parahaemolyticus, Pseudomonas aeruginosa, Escherichia coli, Staphylococcus epidermidis, and methicillin-resistant S. aureus. The AMP showed promising antibacterial activity, with MIC and MBC values ranging from 0.89 to 917.1 µgmL-1 and 3.67 to 1100.52 µgmL-1, respectively. In addition, KK12YW exhibited resistance to high temperatures and remained effective even in the presence of serum and salt, indicating its stability. The peptide also demonstrated minimal hemolysis toward fish RBCs, even at higher concentrations. Taken together, these findings indicate that KK12YW could be a highly promising and viable substitute for conventional antibiotics to combat microbial infections in aquaculture.
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Affiliation(s)
| | - Victoria C Khangembam
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Vinita Pant
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Ritesh Shantilal Tandel
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
- Navsari Gujarat Research Centre, ICAR-Central Institute of Brackishwater Aquaculture, Navsari, 396 450, Gujarat, India
| | - Pramod Kumar Pandey
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Dimpal Thakuria
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India.
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3
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Xu R, Tang J, Hadianamrei R, Liu S, Lv S, You R, Pan F, Zhang P, Wang N, Cai Z, Zhao X. Antifungal activity of designed α-helical antimicrobial peptides. Biomater Sci 2023; 11:2845-2859. [PMID: 36857655 DOI: 10.1039/d2bm01797k] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Antimicrobial resistance (AMR) has become a major global health concern prompting the quest for new antibiotics with higher efficiency and less proneness to drug resistance. Antimicrobial peptides (AMPs) offer such properties and have therefore gained increasing attention as a new generation of antibiotics to overcome AMR. In an attempt to develop new highly selective and highly efficient antifungal peptides, a sequence (named At1) originating from the natural AMP Ponericin-W1 was used as a lead sequence for rational design of a series of short cationic antifungal peptides named At2-At12. The charge, hydrophobicity, and terminal amino acids of the peptides were modified in a systematic way to investigate the effect of such structural changes on the biological activity of the peptides. Among all the designed peptides, three peptides (coded as At3, At5 and At10) exhibited high antifungal activity without any significant hemolytic activity in human red blood cells. The higher selectivity of these peptides for fungal cells over human cells was further confirmed in cocultures of Candida albicans and human foreskin fibroblasts. These three peptides lacked any hydrophilic residues in their hydrophobic domain, contained lysine residues in their hydrophilic region and had an overall charge of 7+. They also had a higher helical content in microbial membrane mimicking DPPG SUVs than the rest of the peptides. The fungi did not develop any resistance to the designed antifungal peptides even after 25 generations indicating low AMR. At5 was also used in vivo for the treatment of wounds infected with Candida albicans in mice and showed superiority over fluconazole for treating infection and accelerating wound healing. There was an interplay between the hydrophobicity and positive charge density to determine the antifungal activity of the peptides. The results from this study suggest this class of antifungal peptides as promising candidates for antifungal drugs with high efficiency, high biocompatibility and low propensity for drug resistance.
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Affiliation(s)
- Ruicheng Xu
- School of Pharmacy, Changzhou University, Changzhou 213164, China.
| | - Jing Tang
- School of Pharmacy, Changzhou University, Changzhou 213164, China.
| | - Roja Hadianamrei
- Department of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, UK.,School of Pharmacy and Biomedical Science, University of Portsmouth, Portsmouth, PO1 2UP, UK
| | - Suyu Liu
- Department of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, UK
| | - Songwei Lv
- School of Pharmacy, Changzhou University, Changzhou 213164, China.
| | - Rongrong You
- School of Pharmacy, Changzhou University, Changzhou 213164, China.
| | - Fang Pan
- School of Pharmacy, Changzhou University, Changzhou 213164, China.
| | - Peng Zhang
- School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Nan Wang
- School of Pharmacy, Changzhou University, Changzhou 213164, China.
| | - Zhiqiang Cai
- School of Pharmacy, Changzhou University, Changzhou 213164, China.
| | - Xiubo Zhao
- School of Pharmacy, Changzhou University, Changzhou 213164, China. .,Department of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, UK
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4
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Identification and Characterization of a Novel Cathelicidin from Hydrophis cyanocinctus with Antimicrobial and Anti-Inflammatory Activity. Molecules 2023; 28:molecules28052082. [PMID: 36903328 PMCID: PMC10004598 DOI: 10.3390/molecules28052082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 02/21/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
The abuse of antibiotics and lack of new antibacterial drugs has led to the emergence of superbugs that raise fears of untreatable infections. The Cathelicidin family of antimicrobial peptide (AMP) with varying antibacterial activities and safety is considered to be a promising alternative to conventional antibiotics. In this study, we investigated a novel Cathelicidin peptide named Hydrostatin-AMP2 from the sea snake Hydrophis cyanocinctus. The peptide was identified based on gene functional annotation of the H. cyanocinctus genome and bioinformatic prediction. Hydrostatin-AMP2 showed excellent antimicrobial activity against both Gram-positive and Gram-negative bacteria, including standard and clinical Ampicillin-resistant strains. The results of the bacterial killing kinetic assay demonstrated that Hydrostatin-AMP2 had faster antimicrobial action than Ampicillin. Meanwhile, Hydrostatin-AMP2 exhibited significant anti-biofilm activity including inhibition and eradication. It also showed a low propensity to induce resistance as well as low cytotoxicity and hemolytic activity. Notably, Hydrostatin-AMP2 apparently decreased the production of pro-inflammatory cytokines in the LPS-induced RAW264.7 cell model. To sum up, these findings indicate that Hydrostatin-AMP2 is a potential peptide candidate for the development of new-generation antimicrobial drugs fighting against antibiotic-resistant bacterial infections.
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5
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Woods C, Woolley L, Partridge G, Chen M, Haney EF, Hancock REW, Buller N, Currie A. Assessing the Activity of Antimicrobial Peptides Against Common Marine Bacteria Located in Rotifer (Brachionus plicatilis) Cultures. Probiotics Antimicrob Proteins 2022; 14:620-629. [PMID: 35612776 PMCID: PMC9246773 DOI: 10.1007/s12602-022-09928-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2022] [Indexed: 11/05/2022]
Abstract
Rotifers are used as the first feed for marine fish larvae and are grown in large cultures that have high loads of organic matter and heterotrophic bacteria; these bacteria are passed on to the developing fish larvae and can potentially lead to bacterial infections. A modified minimum inhibitory concentration (MIC) protocol for antimicrobial peptides was used to determine the potency of ten antimicrobial peptides (AMPs) in artificial seawater relevant to a rotifer culture (salinity of 25‰) against common marine pathogens. All of the AMPs had antimicrobial activity against the bacterial isolates when the salt concentration was approximately zero. However, in high salt concentrations, the majority of the AMPs had an MIC value greater than 65 µg mL−1 in artificial seawater (25‰). The only exceptions were 2009 (32.5 µg mL−1) and 3002 (32.5 µg mL−1) against Vibrio rotiferianus and Tenacibaculum discolor, respectively. The selected synthetic AMPs were not effective at reducing the bacterial load in brackish salt concentrations of a typical commercial rotifer culture (25‰).
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Affiliation(s)
- Chelsea Woods
- College of Science, Murdoch University, Engineering & Education, HealthPerth, WA, Australia. .,Department of Primary Industries and Regional Development, Fremantle, Perth, WA, 6160, Australia.
| | - Lindsey Woolley
- College of Science, Murdoch University, Engineering & Education, HealthPerth, WA, Australia.,Department of Primary Industries and Regional Development, Fremantle, Perth, WA, 6160, Australia
| | - Gavin Partridge
- College of Science, Murdoch University, Engineering & Education, HealthPerth, WA, Australia.,Department of Primary Industries and Regional Development, Fremantle, Perth, WA, 6160, Australia
| | - Mengqi Chen
- Department of Primary Industries and Regional Development, Fremantle, Perth, WA, 6160, Australia
| | - Evan F Haney
- Centre for Microbial Diseases and Immunity Research, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Robert E W Hancock
- Centre for Microbial Diseases and Immunity Research, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Nicky Buller
- College of Science, Murdoch University, Engineering & Education, HealthPerth, WA, Australia.,Department of Primary Industries and Regional Development, Fremantle, Perth, WA, 6160, Australia
| | - Andrew Currie
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth, WA, Australia.,Wesfarmers Centre for Vaccines and Infectious Diseases, Telethon Kids Institute, Perth, WA, Australia
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6
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Bhat RAH, Khangembam VC, Thakuria D, Pant V, Tandel RS, Tripathi G, Sarma D. Antimicrobial Activity of an Artificially Designed Peptide Against Fish Pathogens. Microbiol Res 2022; 260:127039. [DOI: 10.1016/j.micres.2022.127039] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 04/02/2022] [Accepted: 04/08/2022] [Indexed: 12/28/2022]
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7
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Posada V, Espejo BF, Orduz S. De novo design of short antimicrobial lipopeptides. AN ACAD BRAS CIENC 2021; 93:e20210362. [PMID: 34817038 DOI: 10.1590/0001-3765202120210362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 08/05/2021] [Indexed: 11/21/2022] Open
Abstract
The increase in bacterial resistance to antibiotics available leads to the search for new compounds with antimicrobial potential, such as peptides and lipopeptides. In this work, eight short lipopeptides with the structural pattern Cn-X1 X2 X3-NH2 were de novo designed, synthesized by Fmoc solid phase and characterized by instrumental techniques. The results of the in vitro tests indicated that two of them, LIP 4 and LIP 12 display antibacterial activity against 4 pathogenic bacteria with minimum inhibitory concentrations (MIC) between 9.50 and 100 μM and between 8.50 and 10.0 μM, respectively; they did not displayed toxicity to human erythrocytes at concentrations between 3.13 and 50.0 μM. The antibacterial mechanism of action observed by scanning electron microscopy indicate that the cell membrane was the target, causing the formation of blisters and vesicles, with size ranging from 100 to 120 nm. The lipopeptide LIP 12, with higher activity, was stable to proteases of human blood serum.
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Affiliation(s)
- Vanessa Posada
- Universidad Nacional de Colombia, Sede Medellin, Escuela de Química, Facultad de Ciencias, Carrera 65, No. 59A - 110, 050034, Medellin, Colombia
| | - Blanca Fabiola Espejo
- Universidad Nacional de Colombia, Sede Medellin, Escuela de Química, Facultad de Ciencias, Carrera 65, No. 59A - 110, 050034, Medellin, Colombia
| | - Sergio Orduz
- Universidad Nacional de Colombia, Sede Medellin, Escuela de Biociencias, Facultad de Ciencias, Carrera 65, No. 59A - 110, 050034, Medellin, Colombia
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8
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Loffredo MR, Savini F, Bobone S, Casciaro B, Franzyk H, Mangoni ML, Stella L. Inoculum effect of antimicrobial peptides. Proc Natl Acad Sci U S A 2021; 118:e2014364118. [PMID: 34021080 PMCID: PMC8166072 DOI: 10.1073/pnas.2014364118] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The activity of many antibiotics depends on the initial density of cells used in bacterial growth inhibition assays. This phenomenon, termed the inoculum effect, can have important consequences for the therapeutic efficacy of the drugs, because bacterial loads vary by several orders of magnitude in clinically relevant infections. Antimicrobial peptides are a promising class of molecules in the fight against drug-resistant bacteria because they act mainly by perturbing the cell membranes rather than by inhibiting intracellular targets. Here, we report a systematic characterization of the inoculum effect for this class of antibacterial compounds. Minimum inhibitory concentration values were measured for 13 peptides (including all-D enantiomers) and peptidomimetics, covering more than seven orders of magnitude in inoculated cell density. In most cases, the inoculum effect was significant for cell densities above the standard inoculum of 5 × 105 cells/mL, while for lower densities the active concentrations remained essentially constant, with values in the micromolar range. In the case of membrane-active peptides, these data can be rationalized by considering a simple model, taking into account peptide-cell association, and hypothesizing that a threshold number of cell-bound peptide molecules is required in order to cause bacterial killing. The observed effect questions the clinical utility of activity and selectivity determinations performed at a fixed, standardized cell density. A routine evaluation of the dependence of the activity of antimicrobial peptides and peptidomimetics on the inoculum should be considered.
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Affiliation(s)
- Maria Rosa Loffredo
- Laboratory affiliated to Pasteur Italia-Fondazione Cenci Bolognetti, Department of Biochemical Sciences, Sapienza University of Rome, 00185 Rome, Italy
| | - Filippo Savini
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Sara Bobone
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Bruno Casciaro
- Center for Life Nano- & Neuro-Science, Fondazione Istituto Italiano di Tecnologia (IIT), 00161 Rome, Italy
| | - Henrik Franzyk
- Department of Drug Design and Pharmacology, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Maria Luisa Mangoni
- Laboratory affiliated to Pasteur Italia-Fondazione Cenci Bolognetti, Department of Biochemical Sciences, Sapienza University of Rome, 00185 Rome, Italy;
| | - Lorenzo Stella
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, 00133 Rome, Italy;
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9
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Huynh L, Velásquez J, Rabara R, Basu S, Nguyen HB, Gupta G. Rational design of antimicrobial peptides targeting Gram-negative bacteria. Comput Biol Chem 2021; 92:107475. [PMID: 33813188 DOI: 10.1016/j.compbiolchem.2021.107475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 03/02/2021] [Accepted: 03/09/2021] [Indexed: 01/16/2023]
Abstract
Membrane-targeting host antimicrobial peptides (AMPs) can kill or inhibit the growth of Gram-negative bacteria. However, the evolution of resistance among microbes poses a substantial barrier to the long-term utility of the host AMPs. Combining experiment and molecular dynamics simulations, we show that terminal carboxyl capping enhances both membrane insertion and antibacterial activity of an AMP called P1. Furthermore, we show that a bacterial strain with evolved resistance to this peptide becomes susceptible to P1 variants with either backbone capping or lysine-to-arginine substitutions. Our results suggest that cocktails of closely related AMPs may be useful in overcoming evolved resistance.
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Affiliation(s)
- Loan Huynh
- New Mexico Consortium, Los Alamos, NM, 87544, USA
| | | | - Roel Rabara
- New Mexico Consortium, Los Alamos, NM, 87544, USA
| | | | - Hau B Nguyen
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Goutam Gupta
- New Mexico Consortium, Los Alamos, NM, 87544, USA.
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10
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Hussain Bhat RA, Thakuria D, Pant V, Khangembam VC, Tandel RS, Shahi N, Sarma D, Tripathi G, Krishnani KK, Krishna G. Antibacterial and antioomycete activities of a novel designed RY12WY peptide against fish pathogens. Microb Pathog 2020; 149:104591. [DOI: 10.1016/j.micpath.2020.104591] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/20/2020] [Accepted: 10/20/2020] [Indexed: 10/23/2022]
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11
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Yang Y, Wang C, Gao N, Lyu Y, Zhang L, Zhang S, Wang J, Shan A. A Novel Dual-Targeted α-Helical Peptide With Potent Antifungal Activity Against Fluconazole-Resistant Candida albicans Clinical Isolates. Front Microbiol 2020; 11:548620. [PMID: 33101226 PMCID: PMC7554340 DOI: 10.3389/fmicb.2020.548620] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 09/07/2020] [Indexed: 12/30/2022] Open
Abstract
Due to compromised immune system, fungal infection incidences have markedly increased in the last few decades. Pathogenic fungi have developed resistance to the clinically available antifungal agents. Antifungal resistance poses a great challenge to clinical treatment and has stimulated the demand for novel antifungal agents. A promising alternative to the treatment of fungal diseases is the use of antimicrobial peptides (AMPs). However, the antifungal activities of AMPs have not been fully determined. Therefore, this study aimed at designing and screening α-helical peptides with potential antifungal activities. The effects of key physicochemical parameters on antifungal activities were also investigated. A series of lengthened and residue-substituted derivatives of the template peptide KV, a hexapeptide truncated from the α-helical region of porcine myeloid antimicrobial peptide-36, were designed and synthesized. Enhancement of hydrophobicity by introducing aromatic hydrophobic amino acids (tryptophan and phenylalanine) significantly increased the efficacies of the peptides against Candida albicans strains, including fluconazole-resistant isolates. Increased hydrophobicity also elevated the toxic properties of these peptides. RF3 with moderate hydrophobicity exhibited potent anticandidal activities (GM = 6.96 μM) and modest hemolytic activities (HC10 > 64 μM). Additionally, repeated exposure to a subinhibitory concentration of RF3 did not induce resistance development. The antifungal mechanisms of RF3 were due to membrane disruptions and induction of reactive oxygen species production. Such a dual-targeted mechanism was active against drug-resistant fungi. These results show the important role of hydrophobicity and provide new insights into designing and developing antifungal peptides. Meanwhile, the successful design of RF3 highlights the potential utility of AMPs in preventing the spread of drug-resistant fungal infections.
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Affiliation(s)
- Yang Yang
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Chenxi Wang
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Nan Gao
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Yinfeng Lyu
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Licong Zhang
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Sujiang Zhang
- Key Laboratory of Tarim Animal Husbandry Science and Technology, College of Animal Science, Tarim University, Alar, China
| | - Jiajun Wang
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Anshan Shan
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
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12
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Kim SR, Choi KH, Kim KY, Kwon HY, Park SW. Development of a Novel Short Synthetic Antibacterial Peptide Derived from the Swallowtail Butterfly Papilio xuthus Larvae. J Microbiol Biotechnol 2020; 30:1305-1309. [PMID: 32627752 PMCID: PMC9728235 DOI: 10.4014/jmb.2003.03009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 06/09/2020] [Accepted: 06/11/2020] [Indexed: 12/15/2022]
Abstract
Insects possess biological defense systems that can effectively combat the invasion of external microorganisms and viruses, thereby supporting their survival in diverse environments. Antimicrobial peptides (AMPs) represent a fast-acting weapon against invading pathogens, including various bacterial or fungal strains. A 37-residue antimicrobial peptide, papiliocin, derived from the swallowtail butterfly Papilio xuthus larvae, showed significant antimicrobial activities against several human pathogenic bacterial and fungal strains. Jelleines, isolated as novel antibacterial peptides from the Royal Jelly (RJ) of bees, exhibit broad-spectrum protection against microbial infections. In this study, we developed a novel antimicrobial peptide, PAJE (RWKIFKKPFKISIHL-NH2), which is a hybrid peptide prepared by combining 1-7 amino acid residues (RWKIFKK-NH2) of papiliocin and 1-8 amino acid residues (PFKISIHL-NH2) of Jelleine-1 to alter length, charge distribution, net charge, volume, amphipaticity, and improve bacterial membrane interactions. This novel peptide exhibited increased hydrophobicity and net positive charge for binding effectively to the negatively charged membrane. PAJE demonstrated antimicrobial activity against both gram-negative and gram-positive bacteria, with very low toxicity to eukaryotic cells and an inexpensive process of synthesis. Collectively, these findings suggest that this novel peptide possesses great potential as an antimicrobial agent.
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Affiliation(s)
- Seong Ryul Kim
- Sericultural and Apicultural Materials Division, National Academy of Agricultural Science, RDA, Wanju 55365, Republic of Korea
| | - Kwang-Ho Choi
- Sericultural and Apicultural Materials Division, National Academy of Agricultural Science, RDA, Wanju 55365, Republic of Korea
| | - Kee-Young Kim
- Sericultural and Apicultural Materials Division, National Academy of Agricultural Science, RDA, Wanju 55365, Republic of Korea
| | - Hye-Yong Kwon
- Sericultural and Apicultural Materials Division, National Academy of Agricultural Science, RDA, Wanju 55365, Republic of Korea
| | - Seung-Won Park
- Department of Biomedical Science, Daegu Catholic University, Gyeongsan 38430, Republic of Korea,Corresponding author Phone: +82-53-850-3176 Fax: +82-53-359-6846 E-mail:
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13
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Baibek A, Üçüncü M, Blackburn EA, Bradley M, Lilienkampf A. Wash‐free
,
peptide‐based
fluorogenic probes for microbial imaging. Pept Sci (Hoboken) 2020. [DOI: 10.1002/pep2.24167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Assel Baibek
- EaStCHEM School of Chemistry Joseph Black Building, University of Edinburgh Edinburgh UK
| | - Muhammed Üçüncü
- EaStCHEM School of Chemistry Joseph Black Building, University of Edinburgh Edinburgh UK
| | - Elizabeth A. Blackburn
- The Wellcome Centre for Cell Biology Michael Swann Building, University of Edinburgh Edinburgh UK
| | - Mark Bradley
- EaStCHEM School of Chemistry Joseph Black Building, University of Edinburgh Edinburgh UK
| | - Annamaria Lilienkampf
- EaStCHEM School of Chemistry Joseph Black Building, University of Edinburgh Edinburgh UK
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14
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He Y, Jin Y, Ying X, Wu Q, Yao S, Li Y, Liu H, Ma G, Wang X. Development of an antimicrobial peptide-loaded mineralized collagen bone scaffold for infective bone defect repair. Regen Biomater 2020; 7:515-525. [PMID: 33149940 PMCID: PMC7597801 DOI: 10.1093/rb/rbaa015] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/21/2020] [Accepted: 03/17/2020] [Indexed: 12/11/2022] Open
Abstract
The repair of infective bone defects is a great challenge in clinical work. It is of vital importance to develop a kind of bone scaffold with good osteogenic properties and long-term antibacterial activity for local anti-infection and bone regeneration. A porous mineralized collagen (MC) scaffold containing poly(d,l-lactide-co-glycolic acid) (PLGA) microspheres loaded with two antibacterial synthetic peptides, Pac-525 or KSL-W was developed and characterized via scanning electron microscopy (SEM), porosity measurement, swelling and mechanical tests. The results showed that the MC scaffold embedded with smooth and compact PLGA microspheres had a positive effect on cell growth and also had antibacterial properties. Through toxicity analysis, cell morphology and proliferation analysis and alkaline phosphatase evaluation, the antibacterial scaffolds showed excellent biocompatibility and osteogenic activity. The antibacterial property evaluated with Staphylococcus aureus and Escherichia coli suggested that the sustained release of Pac-525 or KSL-W from the scaffolds could inhibit the bacterial growth aforementioned in the long term. Our results suggest that the antimicrobial peptides-loaded MC bone scaffold has good antibacterial and osteogenic activities, thus providing a great promise for the treatment of infective bone defects.
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Affiliation(s)
- Yuzhu He
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Zhongguancun Street, Haidian District, Beijing 100084, China.,Department of Oral Prosthodontics, School of Stomatology, Dalian Medical University, Lvshun South Road, Lushunkou District, Dalian 116044, China
| | - Yahui Jin
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Zhongguancun Street, Haidian District, Beijing 100084, China.,Department of Oral Prosthodontics, School of Stomatology, Dalian Medical University, Lvshun South Road, Lushunkou District, Dalian 116044, China.,Department of Stomatology, Zhejiang Provincial Hospital of Chinese Medicine, The 9th Street, Economic and Technological Development Zone, Hangzhou 310018, China
| | - Xiaoxia Ying
- Department of Oral Prosthodontics, School of Stomatology, Dalian Medical University, Lvshun South Road, Lushunkou District, Dalian 116044, China
| | - Qiong Wu
- School of Life Sciences, Tsinghua University, Zhongguancun Street, Haidian District, Beijing 100084, China
| | - Shenglian Yao
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Zhongguancun Street, Haidian District, Beijing 100084, China
| | - Yuanyuan Li
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Zhongguancun Street, Haidian District, Beijing 100084, China.,Department of Oral Prosthodontics, School of Stomatology, Dalian Medical University, Lvshun South Road, Lushunkou District, Dalian 116044, China
| | - Huiying Liu
- Department of Oral Prosthodontics, School of Stomatology, Dalian Medical University, Lvshun South Road, Lushunkou District, Dalian 116044, China
| | - Guowu Ma
- Department of Oral Prosthodontics, School of Stomatology, Dalian Medical University, Lvshun South Road, Lushunkou District, Dalian 116044, China
| | - Xiumei Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Zhongguancun Street, Haidian District, Beijing 100084, China
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15
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Tong S, Li M, Keyhani NO, Liu Y, Yuan M, Lin D, Jin D, Li X, Pei Y, Fan Y. Characterization of a fungal competition factor: Production of a conidial cell-wall associated antifungal peptide. PLoS Pathog 2020; 16:e1008518. [PMID: 32324832 PMCID: PMC7200012 DOI: 10.1371/journal.ppat.1008518] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 05/05/2020] [Accepted: 04/05/2020] [Indexed: 01/16/2023] Open
Abstract
Competition is one of the fundamental driving forces of natural selection. Beauveria bassiana is a soil and plant phylloplane/root fungus capable of parasitizing insect hosts. Soil and plant environments are often enriched with other fungi against which B. bassiana competes for survival. Here, we report an antifungal peptide (BbAFP1), specifically expressed and localized to the conidial cell wall and is released into the surrounding microenvironment inhibiting growth of competing fungi. B. bassiana strains expressing BbAFP1, including overexpression strains, inhibited growth of Alternaria brassicae in co-cultured experiments, whereas targeted gene deletion of BbAFP1 significantly decreased (25%) this inhibitory effect. Recombinant BbAFP1 showed chitin and glucan binding abilities, and growth inhibition of a wide range of phytopathogenic fungi by disrupting membrane integrity and eliciting reactive oxygen species (ROS) production. A phenylalanine residue (F50) contributes to chitin binding and antifungal activity, but was not required for the latter. Expression of BbAFP1 in tomato resulted in transgenic plants with enhanced resistance to plant fungal pathogens. These results highlight the importance of fungal competition in shaping primitive competition strategies, with antimicrobial compounds that can be embedded in the spore cell wall to be released into the environment during the critical initial phases of germination for successful growth in its environmental niche. Furthermore, these peptides can be exploited to increase plant resistance to fungal pathogens. Microbial competition exerts powerful selective pressures for the development of defensive and offensive methods of suppressing potential competitors. One of the most vulnerable stages for any fungi is the initial germination of resting spores in potentially hostile environments. Currently, we know little about how fungi defend other microbial competitors during the beginning stage of conidial germination. Here, we report on an antifungal peptide from B. bassiana (BbAFP1) that is specifically expressed in mature aerial conidia, with the protein localized exclusively to the conidial cell wall. The “pre-loaded” BbAFP1 is released into the surrounding microenvironment where it can act to inhibit the growth of competing fungi during the initial stages of fungal germination, i.e. largely before actual germ tubes are apparent, thus conferring an advantage to B. bassiana in out-competing susceptible competitors in the microenvironment surrounding the spore. The effects of BbAFP1 on membrane integrity were characterized and a key amino acid (F50) was shown to function in chitin binding and antifungal activity. Transgenic tomato overexpressing BbAFP1 were shown to exhibit enhanced resistance to plant fungal pathogens. Our study provides new insights into the microbial competition and genes involved in this process that can be exploited to increase plant disease resistance.
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Affiliation(s)
- Sheng Tong
- Biotechnology Research Center, Southwest University, Chongqing, P.R. China
| | - Maolian Li
- Biotechnology Research Center, Southwest University, Chongqing, P.R. China
| | - Nemat O. Keyhani
- Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida, United States of America
| | - Yu Liu
- College of Biotechnology, Southwest University, Chongqing, P. R. China
| | - Min Yuan
- Biotechnology Research Center, Southwest University, Chongqing, P.R. China
| | - Dongmei Lin
- Biotechnology Research Center, Southwest University, Chongqing, P.R. China
| | - Dan Jin
- Biotechnology Research Center, Southwest University, Chongqing, P.R. China
| | - Xianbi Li
- Biotechnology Research Center, Southwest University, Chongqing, P.R. China
| | - Yan Pei
- Biotechnology Research Center, Southwest University, Chongqing, P.R. China
| | - Yanhua Fan
- Biotechnology Research Center, Southwest University, Chongqing, P.R. China
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, Southwest University, Chongqing, P.R. China
- * E-mail:
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16
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Whole-Genome Approach to Understanding the Mechanism of Action of a Histatin 5-Derived Peptide. Antimicrob Agents Chemother 2020; 64:AAC.01698-19. [PMID: 31843998 DOI: 10.1128/aac.01698-19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 12/11/2019] [Indexed: 12/13/2022] Open
Abstract
The incidence of opportunistic fungal infections that threaten immunocompromised patients, along with the limited arsenal of antifungal drugs, calls for renewed efforts to develop novel antifungal therapies. Antimicrobial peptides have garnered interest as potential therapeutics. Among naturally occurring peptides, histatin 5 is a well-characterized 24-amino-acid peptide with strong antifungal activity. Our lab has identified a smaller histatin derivative, KM29, with stronger activity against multiple Candida spp., prompting us to investigate its fungicidal mechanism. A genetic screen was developed to test the Saccharomyces cerevisiae genomewide deletion collection for mutants with increased or decreased peptide sensitivity. The goal was to identify genes that would reveal insights into the mechanism of action of KM29, to be assessed in Candida albicans Several biological processes yielded increased sensitivity, with endosomal transport and vacuolar function appearing at high frequencies. Among the pathways involved in increased resistance, mitochondrial function showed the highest normalized genome frequency; hence, we focused on characterizing this pathway. KM29 localizes to mitochondria, and the killing activity depends on a functional electron transport chain. In addition, KM29 triggered reactive oxygen species (ROS) production, which was responsible for some cell death but insufficient to account for the complete killing activity. In agreement with this finding, we found that KM29 induced mitochondrial fragmentation and a mild loss of mitochondrial membrane potential. Furthermore, respiratory mutants exhibited severely diminished KM29 uptake. We confirmed this behavior in a C. albicans respiratory mutant. Taking our findings together, this work delineates the mitochondrial functions associated with KM29 fungicidal activity and provides additional pathways for further characterization in Candida spp.
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17
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Tan P, Lai Z, Zhu Y, Shao C, Akhtar MU, Li W, Zheng X, Shan A. Multiple Strategy Optimization of Specifically Targeted Antimicrobial Peptide Based on Structure-Activity Relationships to Enhance Bactericidal Efficiency. ACS Biomater Sci Eng 2019; 6:398-414. [PMID: 33463238 DOI: 10.1021/acsbiomaterials.9b00937] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Unlike traditional broad-spectrum antibacterial agents, specifically targeted antimicrobial peptides (STAMPs) are difficult for bacteria to develop resistance to due to their unique membrane lytic mechanism. Additionally, STAMPs can maintain a normal ecological balance and provide long-term protection to the body. However, therapeutic applications of STAMPS are hindered by their weak activity and imperfect specificity, as well as lack of knowledge in understanding their structure-activity relationships. To investigate the effects of different parameters on the biological activities of STAMPs, a peptide sequence, WKKIWKDPGIKKWIK, was truncated, extended, and provided with an increased charge and altered amphipathicity. In addition, a novel template modification method for attaching a phage-displayed peptide, which recognized and bound to Escherichia coli (E. coli) cells, to the end of the sequence was introduced. Compared with the traditional template modification method, peptide 13, which contained a phage-displayed peptide at the C-terminus, exhibited superior narrow-spectrum antibacterial activity against E. coli compared to that of parental peptide 2, and the activity and specificity of peptide 13 were increased by 5.0 and 2.4 times, respectively. Additionally, peptide 13 showed low cytotoxicity and relatively desirable salt, serum, acid, alkaline and heat stability. In this study, peptide 13 specifically killed E. coli by causing cytoplasmic membrane rupture and cytosol leakage. In summary, these findings are useful for improving the activity and specificity of STAMPs and show that peptide 13 is able to combat the growing threat of E. coli infections.
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Affiliation(s)
- Peng Tan
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Zhenheng Lai
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Yongjie Zhu
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Changxuan Shao
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Muhammad Usman Akhtar
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Weifen Li
- Institute of Animal Nutrition and Feed Science, College of Animal Science, Zhejiang University, Hangzhou 310058, China
| | - Xin Zheng
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Anshan Shan
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
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18
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C16-Fengycin A affect the growth of Candida albicans by destroying its cell wall and accumulating reactive oxygen species. Appl Microbiol Biotechnol 2019; 103:8963-8975. [PMID: 31630240 DOI: 10.1007/s00253-019-10117-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 08/19/2019] [Accepted: 09/03/2019] [Indexed: 12/14/2022]
Abstract
Candida albicans is the most common clinical pathogenic fungus, which is highly susceptible to immunodeficiency. Development of novel antifungal agents has become a growing trend in the treatment of Candida infections. C16-Fengycin A, a lipopeptide isolated from Bacillus amyloliquefaciens fmb60 showed significant fungicidal activity against C. albicans. In the study, we explored the possible antifungal mode of C16-Fengycin A. It was predicted that C16-Fengycin A had the ability to disrupt the cell wall due to its alterations of cell ultrastructure, and reduction of cell wall hydrophobicity. This was further confirmed by the changes in the exposure of the cell wall components and down-regulation of the genes related in the cell wall synthesis. Meanwhile, with the treatment of C16-Fengycin A, the levels of reactive oxygen species (ROS) increased, resulting in mitochondrial dysfunction in the cells. We hypothesized that the antifungal mechanism of C16-Fengycin A might be via the destruction of the cell wall and the accumulation of ROS, which could activate the High-Osmolarity Glycerol Mitogen-Activated Protein Kinase (HOG-MAPK) pathway. Our findings indicated that C16-Fengycin A could be a potential antifungal agent that could be used to treat candida infections.
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19
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Hu D, Zou L, Li B, Hu M, Ye W, Ji J. Photothermal Killing of Methicillin-Resistant Staphylococcus aureus by Bacteria-Targeted Polydopamine Nanoparticles with Nano-Localized Hyperpyrexia. ACS Biomater Sci Eng 2019; 5:5169-5179. [PMID: 33455223 DOI: 10.1021/acsbiomaterials.9b01173] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Bacterial infections caused by antibiotic-resistant pathogens have become intractable problems to public health. Therefore, there is an imperious demand for developing new approaches to effectively kill antibiotic-resistant bacteria. In this work, we report a kind of bacteria-targeted polydopamine nanoparticle exhibiting great photothermal killing ability toward methicillin-resistant Staphylococcus aureus (MRSA) by nano-localized hyperpyrexia under low-power near-infrared (NIR) light irradiation. These bacteria-targeted nanoparticles (PDA-PEG-Van) are prepared by modifying polydopamine nanoparticles with thiol-poly(ethylene glycol) (mPEG-SH) and vancomycin (Van) molecules. The PEG shell endows the nanoparticles with excellent long-term circulation stability. Due to the multivalent hydrogen-bond interactions between vancomycin and the MRSA cell wall, the vancomycin-modified polydopamine nanoparticles can specifically target MRSA rather than mammalian cells. These bacteria-targeted nanoparticles are employed as a nano-localized heat source to kill MRSA via disrupting the bacterial cell wall and membrane under irradiation of low-power NIR light. More importantly, the surrounding healthy tissues suffer bare damage, owing to the absence of any targeting effect of PDA-PEG-Van toward mammalian cells and the low power of NIR light used in the therapeutic process. Given the above advantages, the bacteria-targeted polydopamine nanoparticles proposed in this work show tremendous potential to treat MRSA infections, because they can effectively limit localized heating in the infection sites to kill bacteria and cut down damage to healthy tissues.
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Affiliation(s)
- Dengfeng Hu
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lingyun Zou
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Bochao Li
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Mi Hu
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Wanying Ye
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jian Ji
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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20
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Luo H, Qing Z, Deng Y, Deng Z, Tang X, Feng B, Lin W. Two Polyketides Produced by Endophytic Penicillium citrinum DBR-9 From Medicinal Plant Stephania kwangsiensis and Their Antifungal Activity Against Plant Pathogenic Fungi. Nat Prod Commun 2019. [DOI: 10.1177/1934578x19846795] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Endophytic fungi, especially those found in medicinal plants, are widely studied as producers of secondary metabolites of biotechnological interest. In this study, on the basis of an activity-directed isolation method and spectroscopic analysis, two active polyketides, citrinin (1) and emodin (2), were isolated and identified from the fermentation of the endophytic fungus Penicillium citrinum DBR-9. This fungus was isolated from the root tubers of the traditional Chinese medicinal plant Stephania kwangsiensis. In vitro antifungal assay showed that the two polyketides displayed significant inhibition on hypha growth of tested plant pathogenic fungi with IC50 values ranging from 3.1 to 123.1 μg/mL and 3.0 to 141.0 μg/mL, respectively. In addition, the mechanism of the effects of emodin (2) on the pathogen revealed it could affect the colony morphology, destroy cell membrane integrity, and influence the protein synthesis of the tested fungal cell. This work is the first report of two polyketides-producing endophytic P. citrinum DBR-9 from the medicinal plant S. kwangsiensis. Our results present new opportunities to deeply understand the potential of these two polyketides as natural antifungal agents to control phytopathogens in agriculture.
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Affiliation(s)
- Haiyu Luo
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Zhen Qing
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Yecheng Deng
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Zhiyong Deng
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Xia’an Tang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Beibei Feng
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Wei Lin
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
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21
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Hazam PK, Akhil R, Jerath G, Saikia J, Ramakrishnan V. Topological effects on the designability and bactericidal potency of antimicrobial peptides. Biophys Chem 2019; 248:1-8. [DOI: 10.1016/j.bpc.2019.02.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 02/22/2019] [Accepted: 02/22/2019] [Indexed: 12/21/2022]
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22
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Imidazole-molecule-capped chitosan–gold nanocomposites with enhanced antimicrobial activity for treating biofilm-related infections. J Colloid Interface Sci 2018; 531:269-281. [DOI: 10.1016/j.jcis.2018.07.058] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 07/09/2018] [Accepted: 07/14/2018] [Indexed: 12/25/2022]
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23
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Arfan G, Ong CYF, Ng SMS, Lau QY, Ng FM, Ong EHQ, Hill J, Chia CSB. Designing an ultra-short antibacterial peptide with potent activity against Mupirocin-resistant MRSA. Chem Biol Drug Des 2018; 93:4-11. [DOI: 10.1111/cbdd.13377] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 05/17/2018] [Accepted: 07/22/2018] [Indexed: 11/28/2022]
Affiliation(s)
- Giovinna Arfan
- Experimental Therapeutics Centre; Agency for Science, Technology and Research (A*STAR); Singapore Singapore
| | - Chu Yang Fann Ong
- Experimental Therapeutics Centre; Agency for Science, Technology and Research (A*STAR); Singapore Singapore
| | - Siew Mei Samantha Ng
- Experimental Therapeutics Centre; Agency for Science, Technology and Research (A*STAR); Singapore Singapore
| | - Qiu Ying Lau
- Experimental Therapeutics Centre; Agency for Science, Technology and Research (A*STAR); Singapore Singapore
| | - Fui Mee Ng
- Experimental Therapeutics Centre; Agency for Science, Technology and Research (A*STAR); Singapore Singapore
| | - Esther Hong Qian Ong
- Experimental Therapeutics Centre; Agency for Science, Technology and Research (A*STAR); Singapore Singapore
| | - Jeffrey Hill
- Experimental Therapeutics Centre; Agency for Science, Technology and Research (A*STAR); Singapore Singapore
| | - Cheng San Brian Chia
- Experimental Therapeutics Centre; Agency for Science, Technology and Research (A*STAR); Singapore Singapore
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24
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He Y, Jin Y, Wang X, Yao S, Li Y, Wu Q, Ma G, Cui F, Liu H. An Antimicrobial Peptide-Loaded Gelatin/Chitosan Nanofibrous Membrane Fabricated by Sequential Layer-by-Layer Electrospinning and Electrospraying Techniques. NANOMATERIALS 2018; 8:nano8050327. [PMID: 29758001 PMCID: PMC5977341 DOI: 10.3390/nano8050327] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 04/22/2018] [Accepted: 05/04/2018] [Indexed: 12/16/2022]
Abstract
Guided bone regeneration (GBR) technique is widely used in the treatment of bone defects caused by peri-implantitis, periodontal disease, etc. However, the GBR membranes commonly used in clinical treatments currently have no antibacterial activity. Therefore, in this study, sequential layer-by-layer electrospinning and electrospraying techniques were utilized to prepare a gelatin (Gln) and chitosan (CS) composite GBR membrane containing hydroxyapatite nanoparticles (nHAp) and antimicrobial peptide (Pac-525)-loaded PLGA microspheres (AMP@PLGA-MS), which was supposed to have osteogenic and antibacterial activities. The scanning electron microscope (SEM) observation showed that the morphology of the nanofibers and microspheres could be successfully produced. The diameters of the electrospun fibers with and without nHAp were 359 ± 174 nm and 409 ± 197 nm, respectively, and the mechanical properties of the membrane were measured according to the tensile stress-strain curve. Both the involvement of nHAp and the chemical crosslinking were able to enhance their tensile strength. In vitro cell culture of rat bone marrow mesenchymal stem cells (rBMSCs) indicated that the Gln/CS composite membrane had an ideal biocompatibility with good cell adhesion, spreading, and proliferation. In addition, the Gln/CS membrane containing nHAp could promote osteogenic differentiation of rBMSCs. Furthermore, according to the in vitro drug release assay and antibacterial experiments, the composite GBR membrane containing AMP@PLGA-MS exhibited a long-term sustained release of Pac-525, which had bactericidal activity within one week and antibacterial activity for up to one month against two kinds of bacteria, S. aureus and E. coli. Our results suggest that the antimicrobial peptide-loaded Gln/CS composite membrane (AMP@PLGA-MS@Gln/CS/nHAp) has a great promise in bone generation-related applications for the unique functions of guiding bone regeneration and inhibiting bacterial infection as well.
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Affiliation(s)
- Yuzhu He
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian 116044, China.
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| | - Yahui Jin
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian 116044, China.
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
- Zhejiang Provincial Hospital of Chinese Medicine, Hangzhou 310018, China.
| | - Xiumei Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| | - Shenglian Yao
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| | - Yuanyuan Li
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian 116044, China.
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| | - Qiong Wu
- School of Life Sciences, Tsinghua University, Beijing 100084, China.
| | - Guowu Ma
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian 116044, China.
| | - Fuzhai Cui
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| | - Huiying Liu
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian 116044, China.
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25
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Wang J, Chou S, Yang Z, Yang Y, Wang Z, Song J, Dou X, Shan A. Combating Drug-Resistant Fungi with Novel Imperfectly Amphipathic Palindromic Peptides. J Med Chem 2018; 61:3889-3907. [PMID: 29648811 DOI: 10.1021/acs.jmedchem.7b01729] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Antimicrobial peptides are an important weapon against invading pathogens and are potential candidates as novel antibacterial agents, but their antifungal activities are not fully developed. In this study, a set of imperfectly amphipathic peptides was developed based on the imperfectly amphipathic palindromic structure R n(XRXXXRX)R n ( n = 1, 2; X represents L, I, F, or W), and the engineered peptides exhibited high antimicrobial activities against all fungi and bacteria tested (including fluconazole-resistant Candida albicans), with geometric mean (GM) MICs ranging from 2.2 to 6.62 μM. Of such peptides, 13 (I6) (RRIRIIIRIRR-NH2) that was Ile rich in its hydrophobic face had the highest antifungal activity (GMfungi = 1.64 μM) while showing low toxicity and high salt and serum tolerance. It also had dramatic LPS-neutralizing propensity and a potent membrane-disruptive mechanism against microbial cells. In summary, these findings were useful for short AMPs design to combat the growing threat of drug-resistant fungal and bacterial infections.
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Affiliation(s)
- Jiajun Wang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Shuli Chou
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Zhanyi Yang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Yang Yang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Zhihua Wang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Jing Song
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Xiujing Dou
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Anshan Shan
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
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26
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Identification of an Ultra-Short Peptide with Potent Pseudomonas aeruginosa Activity for Development as a Topical Antibacterial Agent. Int J Pept Res Ther 2018. [DOI: 10.1007/s10989-018-9678-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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27
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Hu D, Li H, Wang B, Ye Z, Lei W, Jia F, Jin Q, Ren KF, Ji J. Surface-Adaptive Gold Nanoparticles with Effective Adherence and Enhanced Photothermal Ablation of Methicillin-Resistant Staphylococcus aureus Biofilm. ACS NANO 2017; 11:9330-9339. [PMID: 28806528 DOI: 10.1021/acsnano.7b04731] [Citation(s) in RCA: 363] [Impact Index Per Article: 51.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Biofilms that contribute to the persistent bacterial infections pose serious threats to global public health, mainly due to their resistance to antibiotics penetration and escaping innate immune attacks by phagocytes. Here, we report a kind of surface-adaptive gold nanoparticles (AuNPs) exhibiting (1) a self-adaptive target to the acidic microenvironment of biofilm, (2) an enhanced photothermal ablation of methicillin-resistant Staphylococcus aureus (MRSA) biofilm under near-infrared (NIR) light irradiation, and (3) no damage to the healthy tissues around the biofilm. Originally, AuNPs were readily prepared by surface modification with pH-responsive mixed charged zwitterionic self-assembled monolayers consisting of weak electrolytic 11-mercaptoundecanoic acid (HS-C10-COOH) and strong electrolytic (10-mercaptodecyl)trimethylammonium bromide (HS-C10-N4). The mixed charged zwitterion-modified AuNPs showed fast pH-responsive transition from negative charge to positive charge, which enabled the AuNPs to disperse well in healthy tissues (pH ∼7.4), while quickly presenting strong adherence to negatively charged bacteria surfaces in MRSA biofilm (pH ∼5.5). Simultaneous AuNP aggregation within the MRSA biofilm enhanced the photothermal ablation of MRSA biofilm under NIR light irradiation. The surrounding healthy tissues showed no damage because the dispersed AuNPs had no photothermal effect under NIR light. In view of the above advantages as well as the straightforward preparation, AuNPs developed in this work may find potential applications as a useful antibacterial agent in the areas of healthcare.
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Affiliation(s)
- Dengfeng Hu
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou 310027, China
| | - Huan Li
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou 310027, China
| | - Bailiang Wang
- School of Ophthalmology & Optometry, Eye Hospital, Wenzhou Medical University , Wenzhou 325027, China
| | - Zi Ye
- School of Ophthalmology & Optometry, Eye Hospital, Wenzhou Medical University , Wenzhou 325027, China
| | - Wenxi Lei
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou 310027, China
| | - Fan Jia
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou 310027, China
| | - Qiao Jin
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou 310027, China
| | - Ke-Feng Ren
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou 310027, China
| | - Jian Ji
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou 310027, China
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An in-vitro urinary catheterization model that approximates clinical conditions for evaluation of innovations to prevent catheter-associated urinary tract infections. J Hosp Infect 2017; 97:66-73. [DOI: 10.1016/j.jhin.2017.05.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Accepted: 05/11/2017] [Indexed: 12/11/2022]
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Han J, Wang F, Gao P, Ma Z, Zhao S, Lu Z, Lv F, Bie X. Mechanism of action of AMP-jsa9, a LI-F-type antimicrobial peptide produced by Paenibacillus polymyxa JSa-9, against Fusarium moniliforme. Fungal Genet Biol 2017; 104:45-55. [PMID: 28512016 DOI: 10.1016/j.fgb.2017.05.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Revised: 04/28/2017] [Accepted: 05/11/2017] [Indexed: 12/21/2022]
Abstract
LI-F type peptides (AMP-jsa9) are a group of cyclic lipodepsipeptides that exhibit broad antimicrobial spectrum against Gram-positive bacteria and filamentous fungi. We sought to assess the toxicity of AMP-jsa9 and the mechanism of AMP-jsa9 action against Fusarium moniliforme. AMP-jsa9 exhibited weak hemolytic activity and weak cytotoxicity at antimicrobial concentrations (32μg/ml). Confocal laser microscopy, SEM, and TEM indicated that AMP-jsa9 primarily targets the cell wall, plasma membrane, and cytoskeleton, increases membranepermeability, and enhances cytoplasm leakage (e.g., K+, protein). Quantitative proteomic analysis using isobaric tags for relative and absolute quantitation (iTRAQ) detected a total of 162 differentially expressed proteins (59 up-regulated and 103 down-regulated) following treatment of F. moniliforme with AMP-jsa9. AMP-jsa9 treatment also led to reductions in chitin, ergosterol, NADH, NADPH, and ATP levels. Moreover, fumonisin B1 expression and biosynthesis was suppressed in AMP-jsa9-treated F. moniliforme. Our results provide a theoretical basis for the application of AMP-jsa9 as a natural and effective antifungal agent in the agricultural, food, and animal feed industries.
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Affiliation(s)
- Jinzhi Han
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Nanjing 210095, People's Republic of China
| | - Fang Wang
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Nanjing 210095, People's Republic of China
| | - Peng Gao
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Nanjing 210095, People's Republic of China
| | - Zhi Ma
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Nanjing 210095, People's Republic of China
| | - Shengming Zhao
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Nanjing 210095, People's Republic of China
| | - Zhaoxin Lu
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Nanjing 210095, People's Republic of China
| | - Fengxia Lv
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Nanjing 210095, People's Republic of China
| | - Xiaomei Bie
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Nanjing 210095, People's Republic of China.
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Sierra JM, Fusté E, Rabanal F, Vinuesa T, Viñas M. An overview of antimicrobial peptides and the latest advances in their development. Expert Opin Biol Ther 2017; 17:663-676. [PMID: 28368216 DOI: 10.1080/14712598.2017.1315402] [Citation(s) in RCA: 160] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION The recent dramatic increase in the incidence of antimicrobial resistance has been recognized by organizations such as the United Nations and World Health Organization as well as the governments of the USA and several European countries. A relatively new weapon in the fight against severe infections caused by multi-drug resistant bacteria is antimicrobial peptides (AMPs). These include colistin, currently regarded as the last line of antimicrobial therapy against multi-drug resistant microorganisms. Areas covered: Here, the authors provide an overview of the current research on AMPs. The focus is AMPs currently being developed for the treatment of recalcitrant bacterial infections, the synergies of AMPs and antibiotics, and the activity of AMPs against biofilm. This review also includes a brief introduction into the use of AMPs in infections caused by Mycobacterium, fungi, and parasites. Expert opinion: In research into new antimicrobials, AMPs are gaining increasing attention. While many are natural and are produced by a wide variety of organisms, others are being newly designed and chemically synthesized in the laboratory to achieve novel antimicrobial agents. The same strategy to fight infections in nature is thus being effectively exploited to safeguard human and animal health.
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Affiliation(s)
- Josep M Sierra
- a Laboratory of Molecular Microbiology and Antimicrobials, Department of Pathology and Experimental Therapeutics, School of Medicine , University of Barcelona , Barcelona , Spain
| | - Ester Fusté
- a Laboratory of Molecular Microbiology and Antimicrobials, Department of Pathology and Experimental Therapeutics, School of Medicine , University of Barcelona , Barcelona , Spain.,b Dept. Public Health, Mental Health and Perinatal Nursing. School of nursing , University of Barcelona , Barcelona , Spain
| | - Francesc Rabanal
- c Department of Organic Chemistry, Faculty of Chemistry , University of Barcelona , Barcelona , Spain
| | - Teresa Vinuesa
- a Laboratory of Molecular Microbiology and Antimicrobials, Department of Pathology and Experimental Therapeutics, School of Medicine , University of Barcelona , Barcelona , Spain
| | - Miguel Viñas
- a Laboratory of Molecular Microbiology and Antimicrobials, Department of Pathology and Experimental Therapeutics, School of Medicine , University of Barcelona , Barcelona , Spain.,d Departament of Biomedicine , Cooperativa de Ensino Superior Politécnico e Universitário, IINFACTS , Gandra , Portugal
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Gao Q, Yu M, Su Y, Xie M, Zhao X, Li P, Ma PX. Rationally designed dual functional block copolymers for bottlebrush-like coatings: In vitro and in vivo antimicrobial, antibiofilm, and antifouling properties. Acta Biomater 2017; 51:112-124. [PMID: 28131941 DOI: 10.1016/j.actbio.2017.01.061] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 01/09/2017] [Accepted: 01/23/2017] [Indexed: 12/15/2022]
Abstract
Numerous antimicrobial coatings have been developed for biomedical devices/implants, but few can simultaneously fulfill the requirements for antimicrobial and antifouling ability and biocompatibility. In this study, to develop an antimicrobial and antibiofilm surface coating, diblock amphiphilic molecules with antimicrobial and antifouling segments in a single chain were rationally designed and synthesized. Cationic antimicrobial polypeptides (AMP) were first synthesized by N-carboxyanhydride ring-opening polymerization (NCA-ROP). Heterofunctionalized poly(ethylene glycol) with different lengths (methacrylate-PEGn-tosyl, n=10/45/90) was synthesized and site-specifically conjugated with polypeptides to form diblock amphiphiles. Along with increased PEG chain length, hemolytic activity was considerably improved, and broad-spectrum antimicrobial activity is retained. Three MA-PEGn-b-AMP copolymers were further grafted onto the surface of silicone rubber (a commonly used catheter material) via plasma/UV-induced surface polymerizations to form a bottlebrush-like coating with excellent antimicrobial activity against several pathogenic bacteria (Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus), and effectively prevent biofilm formation. This bottlebrush coating also greatly reduced protein adsorption and platelet adhesion, indicating its excellent antifouling ability. An in vitro cytotoxicity study also demonstrated that this coating is biocompatible with mammalian cells. After subcutaneous implantation of the materials in rats, we demonstrated that the g-PEG45-b-AMP bottlebrush coating exhibits significant anti-infective activity in vivo. Thus, this facilely synthesized PEGylated AMP bottlebrush coating is a feasible method to prevent biomedical devices-associated infections. STATEMENT OF SIGNIFICANCE Current antimicrobial coatings are often associated with concerns such as antibiotic resistance, environmental pollution, short-time antimicrobial activity, biofouling, poor blood compatibility and cytotoxicity, etc. To overcome these drawbacks, a robust PEGylated cationic amphiphilic peptides-based bottlebrush-like surface coating is demonstrated here, which fulfil the requirements of antimicrobial and antifouling as well as biocompatibility in the meantime. Briefly, the rational designed g-PEGn-b-AMP block copolymers (n=10/45/90) were synthesized and grafted on silicone surface. This bottlebrush-like coating efficiently kill the contacted bacteria and prevent the biofilm formation, greatly reduced protein and platelet adhesion. It also exhibits excellent blood compatibility and low cytotoxicity in vitro. In particular, g-PEG45-b-AMP coating exhibits significant anti-infection effect in vivo. This coating offering an effective strategy for combating biomedical devices-associated infections.
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Su Y, Zhi Z, Gao Q, Xie M, Yu M, Lei B, Li P, Ma PX. Autoclaving-Derived Surface Coating with In Vitro and In Vivo Antimicrobial and Antibiofilm Efficacies. Adv Healthc Mater 2017; 6. [PMID: 28128893 DOI: 10.1002/adhm.201601173] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 12/25/2016] [Indexed: 12/12/2022]
Abstract
Biomedical device-associated infections which engender severe threat to public health require feasible solutions. In this study, block copolymers consisting of antimicrobial, antifouling, and surface-tethering segments in one molecule are synthesized and grafted on polymeric substrates by a facile plasma/autoclave-assisted method. Hetero-bifunctional polyethylene glycol (PEG) with allyl and tosyl groups (APEG-OTs) is first prepared. PEGs with different molecular weights (1200 and 2400 Da) are employed. Polyhexamethylene guanidine (PHMG) which has excellent broad-spectrum antimicrobial activity and thermal/chemical stability, is conjugated with APEG-OTs to generate the block copolymer (APEG-PHMG). Allyl terminated PHMG (A-PHMG) without PEG segments is also synthesized by reacting PHMG with allyl glycidyl ether. The synthesized copolymers are thermal initiated by autoclaving and grafted on plasma pretreated silicone surface, forming permanently bonded bottlebrush-like coatings. Both A-PHMG and APEG1200/2400 -PHMG coatings exhibit potent antimicrobial activity against gram-positive/negative bacteria and fungus, whereas APEG1200/2400 -PHMG coatings show superior antifouling activity and long-term reusability to A-PHMG coating. APEG2400 -PHMG coating demonstrates the most effective in vitro antibiofilm and protein/platelet-resistant properties, as well as excellent hemo/biocompatibility. Furthermore, APEG2400 -PHMG greatly reduces the bacteria number with 5-log reduction in a rodent subcutaneous infection model. This rationally designed dual-functional antimicrobial and antifouling coating has great potential in combating biomedical devices/implant-associated infections.
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Affiliation(s)
- Yajuan Su
- Center for Biomedical Engineering and Regenerative Medicine; Frontier Institute of Science and Technology; Xi'an Jiaotong University; Xi'an 710054 China
| | - Zelun Zhi
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM); Nanjing Tech University (NanjingTech); Nanjing 211816 China
| | - Qiang Gao
- Center for Biomedical Engineering and Regenerative Medicine; Frontier Institute of Science and Technology; Xi'an Jiaotong University; Xi'an 710054 China
| | - Meihua Xie
- Center for Biomedical Engineering and Regenerative Medicine; Frontier Institute of Science and Technology; Xi'an Jiaotong University; Xi'an 710054 China
| | - Meng Yu
- Center for Biomedical Engineering and Regenerative Medicine; Frontier Institute of Science and Technology; Xi'an Jiaotong University; Xi'an 710054 China
| | - Bo Lei
- Center for Biomedical Engineering and Regenerative Medicine; Frontier Institute of Science and Technology; Xi'an Jiaotong University; Xi'an 710054 China
| | - Peng Li
- Center for Biomedical Engineering and Regenerative Medicine; Frontier Institute of Science and Technology; Xi'an Jiaotong University; Xi'an 710054 China
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM); Nanjing Tech University (NanjingTech); Nanjing 211816 China
| | - Peter X. Ma
- Department of Biomedical Engineering; University of Michigan; Ann Arbor MI 48109 USA
- Department of Biologic and Materials Sciences; University of Michigan; Ann Arbor MI 48109 USA
- Macromolecular Science and Engineering Center; University of Michigan; Ann Arbor MI 48109 USA
- Department of Materials Science and Engineering; University of Michigan; Ann Arbor MI 48109 USA
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Screening for a Potent Antibacterial Peptide to Treat Mupirocin-Resistant MRSA Skin Infections. Int J Pept Res Ther 2017. [DOI: 10.1007/s10989-017-9580-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Ng SMS, Yap YYA, Cheong JWD, Ng FM, Lau QY, Barkham T, Teo JWP, Hill J, Chia CSB. Antifungal peptides: a potential new class of antifungals for treating vulvovaginal candidiasis caused by fluconazole-resistant Candida albicans. J Pept Sci 2017; 23:215-221. [PMID: 28105725 DOI: 10.1002/psc.2970] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Revised: 12/14/2016] [Accepted: 12/23/2016] [Indexed: 11/06/2022]
Abstract
Vulvovaginal candidiasis/candidosis is a common fungal infection afflicting approximately 75% of women globally caused primarily by the yeast Candida albicans. Fluconazole is widely regarded as the antifungal drug of choice since its introduction in 1990 due to its high oral bioavailability, convenient dosing regimen and favourable safety profile. However, its widespread use has led to the emergence of fluconazole-resistant C. albicans, posing a universal clinical concern. Coupled to the dearth of new antifungal drugs entering the market, it is imperative to introduce new drug classes to counter this threat. Antimicrobial peptides (AMPs) are potential candidates due to their membrane-disrupting mechanism of action. By specifically targeting fungal membranes and being rapidly fungicidal, they can reduce the chances of resistance development and treatment duration. Towards this goal, we conducted a head-to-head comparison of 61 short linear AMPs from the literature to identify the peptide with the most potent activity against fluconazole-resistant C. albicans. The 11-residue peptide, P11-6, was identified and assayed against a panel of clinical C. albicans isolates followed by fungicidal/static determination and a time-kill assay to gauge its potential for further drug development. Copyright © 2017 European Peptide Society and John Wiley & Sons, Ltd.
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Affiliation(s)
- Siew Mei Samantha Ng
- Experimental Therapeutics Centre, Agency for Science, Technology and Research (A*STAR), 31 Biopolis Way, Nanos #03-01, 138669, Singapore
| | - Yi Yong Alvin Yap
- Experimental Therapeutics Centre, Agency for Science, Technology and Research (A*STAR), 31 Biopolis Way, Nanos #03-01, 138669, Singapore
| | - Jin Wei Darryl Cheong
- Experimental Therapeutics Centre, Agency for Science, Technology and Research (A*STAR), 31 Biopolis Way, Nanos #03-01, 138669, Singapore
| | - Fui Mee Ng
- Experimental Therapeutics Centre, Agency for Science, Technology and Research (A*STAR), 31 Biopolis Way, Nanos #03-01, 138669, Singapore
| | - Qiu Ying Lau
- Experimental Therapeutics Centre, Agency for Science, Technology and Research (A*STAR), 31 Biopolis Way, Nanos #03-01, 138669, Singapore
| | - Timothy Barkham
- Department of Laboratory Medicine, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, 308433, Singapore
| | - Jeanette Woon Pei Teo
- Department of Laboratory Medicine, National University Hospital, 5 Lower Kent Ridge Road, 119074, Singapore
| | - Jeffrey Hill
- Experimental Therapeutics Centre, Agency for Science, Technology and Research (A*STAR), 31 Biopolis Way, Nanos #03-01, 138669, Singapore
| | - Cheng San Brian Chia
- Experimental Therapeutics Centre, Agency for Science, Technology and Research (A*STAR), 31 Biopolis Way, Nanos #03-01, 138669, Singapore
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35
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Gao Q, Li P, Zhao H, Chen Y, Jiang L, Ma PX. Methacrylate-ended polypeptides and polypeptoids for antimicrobial and antifouling coatings. Polym Chem 2017. [DOI: 10.1039/c7py01495c] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Methacrylate-terminated polypept(o)ides were directly synthesized via NCA-ROP, and then surface-grafted to form a polymer brush coating with infection-resistant efficacy.
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Affiliation(s)
- Qiang Gao
- Center of Biomedical and Engineering and Regenerative Medicine
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an 710054
- China
| | - Peng Li
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing Tech University
- Nanjing 211816
- China
| | - Hongyang Zhao
- Center of Applied Chemical Research
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an 710054
- China
| | - Yashao Chen
- Key Laboratory of Applied Surface and Colloid Chemistry
- School of Chemical and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
- China
| | - Liu Jiang
- Key Laboratory of Applied Surface and Colloid Chemistry
- School of Chemical and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
- China
| | - Peter X. Ma
- Center of Biomedical and Engineering and Regenerative Medicine
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an 710054
- China
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36
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Su Y, Tian L, Yu M, Gao Q, Wang D, Xi Y, Yang P, Lei B, Ma PX, Li P. Cationic peptidopolysaccharides synthesized by ‘click’ chemistry with enhanced broad-spectrum antimicrobial activities. Polym Chem 2017. [DOI: 10.1039/c7py00528h] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A series of broad-spectrum antimicrobial cationic peptidopolysaccharides have been synthesized using a facile thiol–ene ‘click’ chemistry.
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37
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Taniguchi M, Ochiai A, Takahashi K, Nakamichi SI, Nomoto T, Saitoh E, Kato T, Tanaka T. Antimicrobial activity against Porphyromonas gingivalis and mechanism of action of the cationic octadecapeptide AmyI-1-18 and its amino acid-substituted analogs. J Biosci Bioeng 2016; 122:652-659. [DOI: 10.1016/j.jbiosc.2016.05.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 05/27/2016] [Accepted: 05/27/2016] [Indexed: 10/21/2022]
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38
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Guilhelmelli F, Vilela N, Smidt KS, de Oliveira MA, da Cunha Morales Álvares A, Rigonatto MCL, da Silva Costa PH, Tavares AH, de Freitas SM, Nicola AM, Franco OL, Derengowski LDS, Schwartz EF, Mortari MR, Bocca AL, Albuquerque P, Silva-Pereira I. Activity of Scorpion Venom-Derived Antifungal Peptides against Planktonic Cells of Candida spp. and Cryptococcus neoformans and Candida albicans Biofilms. Front Microbiol 2016; 7:1844. [PMID: 27917162 PMCID: PMC5114273 DOI: 10.3389/fmicb.2016.01844] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 11/02/2016] [Indexed: 11/13/2022] Open
Abstract
The incidence of fungal infections has been increasing in the last decades, while the number of available antifungal classes remains the same. The natural and acquired resistance of some fungal species to available therapies, associated with the high toxicity of these drugs on the present scenario and makes an imperative of the search for new, more efficient and less toxic therapeutic choices. Antimicrobial peptides (AMPs) are a potential class of antimicrobial drugs consisting of evolutionarily conserved multifunctional molecules with both microbicidal and immunomodulatory properties being part of the innate immune response of diverse organisms. In this study, we evaluated 11 scorpion-venom derived non-disulfide-bridged peptides against Cryptococcus neoformans and Candida spp., which are important human pathogens. Seven of them, including two novel molecules, showed activity against both genera with minimum inhibitory concentration values ranging from 3.12 to 200 μM and an analogous activity against Candida albicans biofilms. Most of the peptides presented low hemolytic and cytotoxic activity against mammalian cells. Modifications in the primary peptide sequence, as revealed by in silico and circular dichroism analyses of the most promising peptides, underscored the importance of cationicity for their antimicrobial activity as well as the amphipathicity of these molecules and their tendency to form alpha helices. This is the first report of scorpion-derived AMPs against C. neoformans and our results underline the potential of scorpion venom as a source of antimicrobials. Further characterization of their mechanism of action, followed by molecular optimization to decrease their cytotoxicity and increase antimicrobial activity, is needed to fully clarify their real potential as antifungals.
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Affiliation(s)
- Fernanda Guilhelmelli
- Laboratory of Molecular Biology, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Nathália Vilela
- Laboratory of Molecular Biology, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Karina S Smidt
- Laboratory of Applied Immunology, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Marco A de Oliveira
- Laboratory of Molecular Biology, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Alice da Cunha Morales Álvares
- Laboratory of Molecular Biophysics, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Maria C L Rigonatto
- Laboratory of Applied Immunology, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Pedro H da Silva Costa
- Laboratory of Applied Immunology, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Aldo H Tavares
- Laboratory of Applied Immunology, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Sônia M de Freitas
- Laboratory of Molecular Biophysics, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - André M Nicola
- Faculty of Medicine, University of Brasília Brasília, Brazil
| | - Octávio L Franco
- Center of Proteomic and Biochemistry Analysis, Post Graduation in Biotechnology and Genomic Sciences, Catholic University of Brasília Brasília, Brazil
| | - Lorena da Silveira Derengowski
- Laboratory of Molecular Biology, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Elisabeth F Schwartz
- Laboratory of Neuropharmacology, Department of Physiological Sciences, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Márcia R Mortari
- Laboratory of Neuropharmacology, Department of Physiological Sciences, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Anamélia L Bocca
- Laboratory of Applied Immunology, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
| | - Patrícia Albuquerque
- Laboratory of Molecular Biology, Department of Cellular Biology, Institute of Biological Sciences, University of BrasíliaBrasília, Brazil; Faculty of Ceilândia, University of BrasíliaBrasília, Brazil
| | - Ildinete Silva-Pereira
- Laboratory of Molecular Biology, Department of Cellular Biology, Institute of Biological Sciences, University of Brasília Brasília, Brazil
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Ramesh S, Govender T, Kruger HG, de la Torre BG, Albericio F. Short AntiMicrobial Peptides (SAMPs) as a class of extraordinary promising therapeutic agents. J Pept Sci 2016; 22:438-51. [DOI: 10.1002/psc.2894] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 04/08/2016] [Accepted: 04/11/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Suhas Ramesh
- Catalysis and Peptide Research Unit, School of Health Sciences; University of KwaZulu-Natal; Durban 4001 South Africa
| | - Thavendran Govender
- Catalysis and Peptide Research Unit, School of Health Sciences; University of KwaZulu-Natal; Durban 4001 South Africa
| | - Hendrik G. Kruger
- Catalysis and Peptide Research Unit, School of Health Sciences; University of KwaZulu-Natal; Durban 4001 South Africa
| | - Beatriz G. de la Torre
- Catalysis and Peptide Research Unit, School of Health Sciences; University of KwaZulu-Natal; Durban 4001 South Africa
| | - Fernando Albericio
- Catalysis and Peptide Research Unit, School of Health Sciences; University of KwaZulu-Natal; Durban 4001 South Africa
- School of Chemistry and Physics; University of KwaZulu-Natal; Durban 4001 South Africa
- CIBER-BBN, Networking Centre on Bioengineering; Biomaterials and Nanomedicine; Barcelona Science Park 08028 Barcelona Spain
- Department of Chemistry, College of Science; King Saud University; P.O. Box 2455 Riyadh 11451 Saudi Arabia
- Department of Organic Chemistry; University of Barcelona; 08028 Barcelona Spain
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Cameron A, De Zoysa GH, Sarojini V. Antimicrobial peptides against Pseudomonas syringae pv. actinidiae and Erwinia amylovora: Chemical synthesis, secondary structure, efficacy, and mechanistic investigations. Biopolymers 2016; 102:88-96. [PMID: 24122768 DOI: 10.1002/bip.22423] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 09/09/2013] [Accepted: 09/18/2013] [Indexed: 02/01/2023]
Abstract
We report on structurally modified dodecapeptide amides (KYKLFKKILKFL-NH2) and two analogs of a hexapeptide amide (WRWYCR-NH2) with antibacterial activity against the Gram negative pathogens Pseudomonas syringae pv. actinidiae (Psa) and Erwinia amylovora (Ea). Dodecapeptide minimal inhibitory concentrations (MICs) ranged from 3.2 to 15.4 µM, with the unmodified peptide being the most potent against both pathogens. The unmodified dodecapeptide also had 32-58% α-helicity in membrane mimetic environments (50% v/v trifluoroethanol and 30 mM SDS micelles). Structural modifications which included branching, acylation, and conjugation with 5-nitro-2-furaldehyde (NFA) proved detrimental to both antimicrobial activity and α-helicity. Scanning electron microscopy (SEM) revealed distinct morphological changes to bacterial cells treated with the different peptides, leading to blistering of the membrane and cell lysis. MICs of the hexapeptide amide were 3.9-7.7 µM against both pathogens. The hexapeptide acid did not show anti-bacterial activity against either pathogen. However, the NFA conjugated hexapeptide acid was more active than the parent peptide or NFA alone with MICs of 1.6-3.2 µM against the pathogens. SEM analysis revealed shriveling and collapse of bacterial cells treated with the hexapeptide, whereas shortening and compactness on exposure to streptomycin. A colorimetric assay demonstrated that the dodecapeptides were likely to act by targeting the bacterial membrane, whereas the hexapeptides, streptomycin, and NFA were not, thereby supporting the morphological changes observed during SEM. To the best of our knowledge, this appears to be the first report of antimicrobial peptide activity against Psa, a pathogen that is currently devastating the kiwifruit industry internationally.
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Affiliation(s)
- Alan Cameron
- School of Chemical Sciences, The University of Auckland, Private Bag, 92019, Auckland, New Zealand
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Taniguchi M, Takahashi N, Takayanagi T, Ikeda A, Ishiyama Y, Saitoh E, Kato T, Ochiai A, Tanaka T. Effect of substituting arginine and lysine with alanine on antimicrobial activity and the mechanism of action of a cationic dodecapeptide (CL(14-25)), a partial sequence of cyanate lyase from rice. Biopolymers 2016; 102:58-68. [PMID: 23982951 DOI: 10.1002/bip.22399] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 07/26/2013] [Accepted: 08/20/2013] [Indexed: 11/07/2022]
Abstract
The antimicrobial activity of analogs obtained by substituting arginine and lysine in CL(14-25), a cationic α-helical dodecapeptide, with alanine against Porphyromonas gingivalis, a periodontal pathogen, varied significantly depending on the number and position of cationic amino acids. The alanine-substituted analogs had no hemolytic activity, even at a concentration of 1 mM. The antimicrobial activities of CL(K20A) and CL(K20A, K25A) were 3.8-fold and 9.1-fold higher, respectively, than that of CL(14-25). The antimicrobial activity of CL(R15A) was slightly lower than that of CL(14-25), suggesting that arginine at position 15 is not essential but is important for the antimicrobial activity. The experiments in which the alanine-substituted analogs bearing the replacement of arginine at position 24 and/or lysine at position 25 were used showed that arginine at position 24 was crucial for the antimicrobial activity whenever lysine at position 25 was substituted with alanine. Helical wheel projections of the alanine-substituted analogs indicate that the hydrophobicity in the vicinity of leucine at position 16 and alanines at positions 18 and/or 21 increased by substituting lysine at positions 20 and 25 with alanine, respectively. The degrees of diSC3 -5 release from P. gingivalis cells and disruption of GUVs induced by the alanine-substituted analogs with different positive charges were not closely related to their antimicrobial activities. The enhanced antimicrobial activities of the alanine-substituted analogs appear to be mainly attributable to the changes in properties such as hydrophobicity and amphipathic propensity due to alanine substitution and not to their extents of positive charge (cationicity).
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Affiliation(s)
- Masayuki Taniguchi
- Department of Materials Science and Technology, Graduate School of Science and Technology, Niigata University, Niigata, 950-2181, Japan; Center for Transdisciplinary Research, Niigata University, Niigata, 950-2181, Japan
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42
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Wang M, Zhou C, Chen J, Xiao Y, Du J. Multifunctional Biocompatible and Biodegradable Folic Acid Conjugated Poly(ε-caprolactone)–Polypeptide Copolymer Vesicles with Excellent Antibacterial Activities. Bioconjug Chem 2015; 26:725-34. [DOI: 10.1021/acs.bioconjchem.5b00061] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mingzhi Wang
- School of Materials Science
and Engineering, Key Laboratory of Advanced Civil Engineering Materials
of Ministry of Education, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Chuncai Zhou
- School of Materials Science
and Engineering, Key Laboratory of Advanced Civil Engineering Materials
of Ministry of Education, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Jing Chen
- School of Materials Science
and Engineering, Key Laboratory of Advanced Civil Engineering Materials
of Ministry of Education, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Yufen Xiao
- School of Materials Science
and Engineering, Key Laboratory of Advanced Civil Engineering Materials
of Ministry of Education, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Jianzhong Du
- School of Materials Science
and Engineering, Key Laboratory of Advanced Civil Engineering Materials
of Ministry of Education, Tongji University, 4800 Caoan Road, Shanghai 201804, China
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43
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High in vitro antibacterial activity of Pac-525 against Porphyromonas gingivalis biofilms cultured on titanium. BIOMED RESEARCH INTERNATIONAL 2015; 2015:909870. [PMID: 25710035 PMCID: PMC4325973 DOI: 10.1155/2015/909870] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 01/03/2015] [Indexed: 11/18/2022]
Abstract
In order to investigate the potential of short antimicrobial peptides (AMPs) as alternative antibacterial agents during the treatment of peri-implantitis, the cytotoxic activity of three short AMPs, that is, Pac-525, KSL-W, and KSL, was determined using the MTT assay. The antimicrobial activity of these AMPs, ranging in concentration from 0.0039 mg/mL to 0.5 mg/mL, against the predominant planktonic pathogens, including Streptococcus sanguis, Fusobacterium nucleatum, and Porphyromonas gingivalis, involved in peri-implantitis was investigated. Furthermore, 2-day-old P. gingivalis biofilms cultured on titanium surfaces were treated with Pac-525 and subsequently observed and analysed using confocal laser scanning microscopy (CLSM). The average cell proliferation curve indicated that there was no cytotoxicity due to the three short AMPs. The minimum inhibitory concentration and minimum bactericidal concentration values of Pac-525 were 0.0625 mg/mL and 0.125 mg/mL, respectively, for P. gingivalis and 0.0078 mg/mL and 0.0156 mg/mL, respectively, for F. nucleatum. Using CLSM, we confirmed that compared to 0.1% chlorhexidine, 0.5 mg/mL of Pac-525 caused a significant decrease in biofilm thickness and a decline in the percentage of live bacteria. These data indicate that Pac-525 has unique properties that might make it suitable for the inhibition the growth of pathogenic bacteria around dental implants.
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De Zoysa GH, Cameron AJ, Hegde VV, Raghothama S, Sarojini V. Antimicrobial Peptides with Potential for Biofilm Eradication: Synthesis and Structure Activity Relationship Studies of Battacin Peptides. J Med Chem 2015; 58:625-39. [DOI: 10.1021/jm501084q] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gayan Heruka De Zoysa
- School
of Chemical Sciences, The University of Auckland, Private Bag, 92019 Auckland, New Zealand
| | - Alan James Cameron
- School
of Chemical Sciences, The University of Auckland, Private Bag, 92019 Auckland, New Zealand
| | - Veena V. Hegde
- NMR
Research Centre, Indian Institute of Science, Bangalore 560012, India
| | | | - Vijayalekshmi Sarojini
- School
of Chemical Sciences, The University of Auckland, Private Bag, 92019 Auckland, New Zealand
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A Head-to-Head Comparison of the Antimicrobial Activities of 30 Ultra-Short Antimicrobial Peptides Against Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans. Int J Pept Res Ther 2014. [DOI: 10.1007/s10989-014-9440-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Basu A, Mishra B, Dey S, Leong SSJ. Intein based bioprocess for production of a synthetic antimicrobial peptide: an alternative route to solid phase peptide synthesis. RSC Adv 2014. [DOI: 10.1039/c4ra04056b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Intein based bioprocessing strategy for producing antimicrobial peptide candidate was found to be more sustainable compared to solid phase peptide synthesis strategy (SPPS).
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Affiliation(s)
- Anindya Basu
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- , Singapore
| | - Biswajit Mishra
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- , Singapore
| | - Sharmistha Dey
- Department of Biophysics
- All India Institute of Medical Sciences
- New Delhi, India
| | - Susanna Su Jan Leong
- Singapore Institute of Technology
- , Singapore
- Department of Biochemistry
- Yong Loo Lin School of Medicine
- National University of Singapore
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Zhu X, Dong N, Wang Z, Ma Z, Zhang L, Ma Q, Shan A. Design of imperfectly amphipathic α-helical antimicrobial peptides with enhanced cell selectivity. Acta Biomater 2014; 10:244-57. [PMID: 24021230 DOI: 10.1016/j.actbio.2013.08.043] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 08/14/2013] [Accepted: 08/29/2013] [Indexed: 11/18/2022]
Abstract
Antimicrobial peptides (AMPs), which are produced by multicellular organisms as a defense mechanism against competing pathogenic microbes, appear to be excellent candidates for the development of novel antimicrobial agents. Amphipathicity is traditionally believed to be crucial to the de novo design or systematic optimization of AMPs. In this study, we designed a series of short α-helical AMPs with imperfect amphipathicity to augment the arsenal of strategies and to gain further insights into their antimicrobial and hemolytic activity. These imperfectly amphipathic α-helical AMPs were designed by replacing the paired charged amino acid residues on the polar face of an amphipathic peptide with tryptophan residues on the basis of α-helical protein folding principles. PRW4, an imperfectly amphipathic α-helical AMP with hydrogen bonds formed by paired tryptophan residues, was observed to be more selective towards bacterial cells than toward human red blood cells. PRW4 was also effective against Gram-negative and Gram-positive bacteria, and fluorescence spectroscopy, flow cytometry, scanning electron microscopy and transmission electron microscopy indicated that PRW4 killed microbial cells by permeabilizing the cell membrane and damaging their membrane integrity. Therefore, disruptive amphipathicity has excellent potential for the rational design and optimization of AMPs with promising antimicrobial activities.
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Affiliation(s)
- Xin Zhu
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, People's Republic of China
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Zhou J, Guo A, Qi X. Cell envelope disruption of E. coli exposed to ϵ-polylysine by FESEM and TEM technology. SCANNING 2013; 35:412-417. [PMID: 23471731 DOI: 10.1002/sca.21086] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 01/23/2012] [Accepted: 01/30/2013] [Indexed: 06/01/2023]
Abstract
To investigate the action mechanism of ϵ-polylysine (ϵ-PL) against Escherichia coli (E. coli), a new field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) technology has been developed. The log phase E. coli cells were first incubated with ϵ-PL for 8 min, then the samples were directly added onto the silicon platelet and the copper grid, followed by a simple in situ fixation and freezing dehydration. FESEM and TEM were used to examine the ultrastructure changes in the bacterial envelope which was affected by ϵ-PL. various damages of E. coli cell envelope by ϵ-PL have demonstrated the detachment of outer membrane, the swelling of inner membrane, the apical burst of cells and the leakage of cytosol at a minimal inhibitory concentration (MIC) concentration. It also exhibited whole cell lysis at double MIC concentration. In summary, the new FESEM and TEM technology and appropriate sample preparation protocols have been found to be useful for investigating the biocidal activity of ϵ-PL against E. coli.
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Affiliation(s)
- Junying Zhou
- Zhongnan Hospital, Wuhan University, Wuhan, P.R. China
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Mishra B, Basu A, Saravanan R, Xiang L, Yang LK, Leong SSJ. Lasioglossin-III: antimicrobial characterization and feasibility study for immobilization applications. RSC Adv 2013. [DOI: 10.1039/c3ra40887f] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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Niu M, Li X, Gong Q, Wang C, Qin C, Wang W, Chen P. Expression of 4kD scorpion defensin and its in vitro synergistic activity with conventional antibiotics. World J Microbiol Biotechnol 2012; 29:281-8. [PMID: 23054701 DOI: 10.1007/s11274-012-1181-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 09/25/2012] [Indexed: 01/09/2023]
Abstract
The 4kD scorpion defensin (SD) is a potent disulfide-linked peptide. In this study, we expressed it in methylotrophic yeast Pichia pastoris and purified it using Ni-NTA His Bind Resin. We investigated its in vitro antibacterial activity and effect in combination with several conventional antibiotics. We first examined its antibacterial activity towards several Gram-positive and Gram-negative bacteria. Then we used the broth microdilution method to test drugs alone and in combination and used the fractional inhibitory concentration (FIC index) to classify the drug interactions. Our study showed the expressed SD peptide has antibacterial activity against Salmonella typhimurium, E. coli and S. aureus etc. Synergy or additive interaction was observed between SD and Norfloxacin, Polymyxin B and Ampicillin. Cell growth tests showed that combination of SD and Norfloxacin can improve their activity against bacteria. This result maybe permit lower using of the conventional antibiotic agents more effectively and safely.
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Affiliation(s)
- Mingfu Niu
- Food and Bioengineering College, He'nan University of Science and Technology, Luoyang, 471003 He'nan, People's Republic of China.
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